4:20, I was told the same thing but from experience found that the higher maH (esp. freshly charged) batteries also seem to have a 'top off' period where they generate more heat. In either case, as you know, rechargables also have a significant 'drop off' period towards the end of their charge. By the nature of the simple design, the MF reg temps sort of 'floor it'. Cycling the material around the heating element is central to good vaping, regardless of the device. The Volcano has a auto-stirring mechanism built-in. I have found the experience like making popcorn campfire jiffy-pop style and am getting more adept at it - I also feel more comfortable moving and gently shaking MF's products than other vapes which do include soldered electronics.